一、前言随着微型计算机的急速发展和广泛应用,也相应地突出了数-模(D-A),模-数(A-D)转换器的重要性。在转换器电路中,通常存在着数字与模拟电路,而且要求它具有高分辨率、高精度、高速转换、高稳定性、低功耗和高可靠性等,因此,对制造技术的要求也是很高的。目前,在工艺上,转换器可分为组合件、混合集成及单块集成等三种形式。组合件型转换器由高密度组装分立元件而制成,虽然在设计上自由度较大,目前已 I. INTRODUCTION With the rapid development and widespread use of microcomputers, the importance of digital-to-analog (D-A) and analog-to-digital (A-D) converters has been highlighted accordingly. In converter circuits, digital and analog circuits often exist and require high resolution, high precision, high speed switching, high stability, low power consumption and high reliability, so the requirements for manufacturing technology are also very high High. Currently, in the process, the converter can be divided into assembly, hybrid integration and integration of three forms. Assembly type converter is made of high-density assembled discrete components, although the design of a larger degree of freedom, has now